CVE-2021-24376 Explained : Impact and Mitigation
Discover the impact of CVE-2021-24376 affecting Autoptimize plugin before 2.7.8. Learn about the vulnerability, affected systems, exploitation methods, and mitigation steps.
Autoptimize WordPress plugin before version 2.7.8 is affected by arbitrary file upload vulnerability via the "Import Settings" feature. An attacker can upload a zip file containing a directory with a PHP file, leading to Remote Code Execution.
Understanding CVE-2021-24376
This CVE highlights a security issue in the Autoptimize WordPress plugin version 2.7.8 and below, allowing attackers to upload malicious files via the "Import Settings" function.
What is CVE-2021-24376?
The Autoptimize plugin fails to delete malicious files extracted from uploaded archives, enabling the upload of a zip file with a PHP file inside, circumventing a previous security patch (CVE-2020-24948) that aimed to prevent Remote Code Execution.
The Impact of CVE-2021-24376
The vulnerability enables threat actors to upload and execute malicious PHP files, potentially compromising the website's security and integrity.
Technical Details of CVE-2021-24376
The following details provide insight into the vulnerability.
Vulnerability Description
Autoptimize WordPress plugin versions lower than 2.7.8 allow unauthorized file uploads, letting attackers execute arbitrary code through crafted zip files.
Affected Systems and Versions
Autoptimize plugin versions before 2.7.8 are affected by this vulnerability, impacting websites that utilize this specific version.
Exploitation Mechanism
Exploitation involves uploading a zip file containing a directory with a PHP file through the "Import Settings" feature, bypassing security checks.
Mitigation and Prevention
Addressing and preventing the CVE-2021-24376 vulnerability is crucial for website security.
Immediate Steps to Take
Update the Autoptimize plugin to version 2.7.8 or higher to mitigate the vulnerability and prevent arbitrary file uploads.
Long-Term Security Practices
Regularly monitor plugin updates and security advisories to stay informed about potential vulnerabilities and apply patches promptly.
Patching and Updates
Install security patches and updates released by the plugin vendor to ensure your website is protected against known vulnerabilities.